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(No Model.) 2 Sheets-Sheet 1.

H. W. THOMAS. ROLLS FOR ROLLING GIRDER RAILS. No. 449,013. Patented Mar. 24, 1891.

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(No Model.)

H W THOMAS ROLLS FOR ROLLING GIRDER RAILS.

Patented Mar. 24, 1891. 1m=--m HIIH 1 -Tm-- rmH" Wiinasses Henry W 77007706256 W me @1507 r%m ca. Mam-trod. wunmomn o c UNI ED STATES PATENT OFFICE.

HENRY WV. THOMAS, OF DANVILLE, PENNSYLVANIA, ASSIGNOR TO THE NORTH BRANCH STEEL COMPANY, OF SAME PLACE.

ROLLS FOR ROLLING GIRDE R-RAILS.

SPECIFICATION forming part of Letters Patent No. 449,013, dated March 24, 1891.

Application filed May 1, 1889. Serial No. 309,174. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY W. THOMAS, a subject of the Queen of Great Britain and Ireland, residing at Danville, Montour county,

Pennsylvania,haveinventedcertainImprovements in Rolls for Rolling Girder-Rails, of which the following is a specification.

The object of my invention is to provide rolls for reducing a rectangular bloom into a side bearing flanged girder-rail.

In the accompanying drawings, Figure 1 is a side view of the first roughing-rolls with the passes indicated in section. Fig. 2 is a side view of the second roughing-rolls, also with the passes shown in section; and Fig. 3 is a side view of the finishing-rolls with the passes in section.

The first pass 1 is a quadrangular pass with rounded corners, the contour of the ,upper roll being practically flat at the center with ogee-curved sides, while the bottom roll has a practically flat center with curved sides,

' the groove in the lower roll beingby-preference deeper than that of the upper roll for the commencement of the formation ofthe tram portion of the rail. The bloom is passed into this pass diagonally, instead of flat, as in ordinary rolling. The bloom is concaved on two sides by the ogee sides of the upper roll, while the bottom roll simultaneously gives curvature to the two opposite sides, the bloom being thus reduced to the desired form of bar to be operated on in anotherdirection in the four following passes 2, 3, 4, and 5. The portion a of the bar resulting from the first pass is gradually formed into one of the flanges of the rail, while the portion 0 is formed into the opposite flange, the portion d being formed into the head and the portion 6 into the tram of the rail.

- pass 2 is to reduce the section of the bar and at the same time to continue the shaping out The action of the It will be understood that the groove for forming the projection 6 may be turned in the upper roll in place of the lower one without departing from my invention.

In the pass 6 the portion at is compressed, so as to thin it and reduce it to a rudimentary form of head, and at the same time the web portion of the bar is reduced in thickness. The bar from pass 6 is inserted intopass 7 of the rolls, (shown in Fig. 2,) which are the second roughing-rolls. This pass 7 receives the bar one quarter turned from pass 6, and reduces the height of the bar, and still further shapes the head and tram, forming at the same time the shoulder between these two portions of the rail. It will be noticed that in this pass 7 the metal is not only compressed at the tram portion 0, but also at the head portion a, thus preventing any distortion or twisting of the metal as it is projected' from the rolls.

The bar is introduced into pass8 one-quarter turned. This pass is so formed as to compress the bar at the center, thus carrying forward the shaping of the web portion of the rail, and pass No. 9 continues the formation of the web.

Pass 10 is an oblique dummy pass, the ob-.

ject of which is to give the proper shape to the head and to the flange directly under the tram portion of the rail, as shown, the metal of the tram portion and of the flange under the head being practically undisturbed.

The first pass 11 in the finishing-rolls, Fig. 3, reduces the height of the rail, and also shapes the tram and the flange directly under the head of the rail in the same manner as the pass 10 shaped the head of the rail and the opposite base-flange. I

In both of the passes 10 and 11 it will be noticed that the projecting portions on opposite sides of the rail-bar are simultaneously acted upon, so that the bar will pass through the rolls in a straight line Without distortion. As the flat portions of the passes 10 and 11 are oblique, the rolls are provided with beveled fillets w and 10, so that the two portions of each pass corresponding to the top and outer side of the head of the rail are at right angles to each other, whereby the proper shape of the outer corner of the head is maintained for its passage through the subsequent passes, in which such right-angled corner is present. The beveled corner w, 5 also by bearing against the end of the head porton of the bar, prevents lateral displacement of this portion of the bar, so that the tram portion will be promptly acted upon.

The shaping of the tram portion of the rail from its junction with the web to the outer end without action upon or interference with the base-flange under said tram constitutesa distinctive feature of my invention, the said base-flange preventing a grip upon the tram portion of the rail down to the root of the same when ordinary methods of rolling are adopted.

The main purpose of the passes 12, 13, 14, and is to reduce the rail to its proper form, which is done without interfering with the shape oi the tram-head and opposite baseflange of the rail.

By the above-described operations I am enabled to form a wide tram-flanged girderrail by simple rolling and without that disfiguring of a portion of the tram which frequently results when the ordinary flat dummy passes are used.

It will be understood that I do not limit myself to three-high rolls, as two-high rolls may be used,and the reducing-passes may be of difierent form or number, as required inf rolling diiferent sizes or weights of rails, and one or all of the passes may be transposed. For instance, the grooves in the bottom rolls may be cut in the top rolls, and vice versa, without departing from my invention.

The passes 1, 6, and 10 and the general combination I do not claim in this application, as they form the subject of a divisional application filed by me November 4, 1889, SerialNo. 329,213.

I claim as my invention- 1. In rolls for rolling side-bearing flanged girder-rails, rolls having an oblique dummy pass, whereby the laterally-proj ecting tram is acted upon from about its junction with the web to its outer end, substantially as described.

2. In rolls for rolling side-bearing flanged girder-rails, rolls having an oblique dummy pass of a contour substantially as described, whereby a laterally-projecting portion of the top of the rail and an opposite laterally-projecting portion at the base of the rail are simultaneously acted upon, substantially as specified.

3. In rolls for rolling side-bearing flanged girder-rails, rolls having an oblique dummy pass with beveled corner, substantially as specified.

4. In rolls for rolling side-bearing flanged girder-rails, rolls having the oblique dummy pass 11 with beveled corner 10, against which the end of the head portion of the bar bears, substantially as specified.

5. In rolls for rolling side-bearing flanged girder-rails, rolls having edging-passes combined with an oblique dummy pass to act upon the laterally-proj ecting tram from about its junction with the web to its outer end.

6. In rolls for rolling side-bearing flanged girder-rails, rolls having edging-passes combined with an oblique dummy pass to act simultaneously upon the tram and the diagonally-opposite flange at the base of the rail.

7. In rolls for rolling side-bearing flanged girder-rails, rolls having two or more oblique dummy passes, one to act simultaneously upon the tram and the diagonally-opposite flange at the base of the rail and the other to act simultaneously upon the head and the diagonally-opposite flange at the base of the rail, in combination with edging-passes preceding and succeeding the oblique dummy passes.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY W. THOMAS.

\Vitnesses:

WILLIAM D. CONNER, HENRY Howson. 

